Math Review (Chapter 3)

98 + 89 = ___ + ___ = ___. Use commutative rules of addition to answer the question.

Juan wants to find the sum of 12, 32, and 45. He says that the only way to add the numbers if to add from left to right. Is he correct? Explain using associative or commutative rule of addition?

Which one is the complements of 100, 88 and 12 or 86 and 15?

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